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TIL that hummingbirds can fly backward because they can manipulate their feathers to change pitch, which affects whether they move up or down, and yaw, which affects whether they move right or left.

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py84 TIL Scooby-Doo was a triplet who had five brothers total and one sister. His sister is the mother of his nephew, Scrappy-Doo.
gMDDA TIL the last two Jews in Afghanistan hated each other so much the Taliban had to step in and mediate, imprisoning both, but then releasing both after their "constant bickering became too annoying"
6E9Jw TIL modern capital letters are characterized by straight lines and supple curves to make them easier to carve into stone. Lower case letters were only used for everyday writing and weren't originally used in conjunction with upper case.
dYr7 TIL James Franco, a non-smoker, took up smoking two packs of cigarettes a day, learned to ride a motorcycle and play guitar, and cut himself off from his loved ones, all to prepare for his role as James Dean.
gM09W TIL the United Nations defines youth as persons between the ages of 15 and 24.